A single card drawn from an ordinary deck. what is the probability of each of the following events.
a. heart
b. jack and a spade
c. not a king
d. not a diamond
e. club or a diamond
f. ace of clubs
g. jack or a spade
h. both red or black
Remember that
we have 52 cards
so
Part a. heart
we have 13 heart's cards
so
P=13/52 ------> simplify ------> P=1/4 or 0.25
Part b. jack and a spade
we have 4 jacks ------> jack and spade is only one card
so
P=1/52
Part c. not a king
we have 4 kings
so
not a king we have 48 cards
so
P=48/52
Part d. not a diamond
we have 13 cards diamond
so
not a diamond we have 39 cards
P=39/52
Part e. club or a diamond
we have 13 cards club and 13 cards diamond
so
P=26/52 -----> P=1/2 0r 0.50
Part f. ace of clubs
we have 1 card ace of clubs
so
P=1/52
Part g. jack or a spade
we have 4 cards jacks and 13 cards spade (one card spade is a jack)
so
P=(4+12)/52
P=16/52
Part h. both red or black
we have 13 cards red and 13 cards black
so
P=52/52=1